Removal of acetylsalicylate and methyl-theobromine from aqueous environment using nano-photocatalyst WO3-TiO2 @g-C3N4 composite

Tahir, Muhammad Bilal; Sagir, Muhammad; Shahzad, Khurram

doi:10.1016/j.jhazmat.2018.09.055

Cited by 162 publications

(36 citation statements)

References 48 publications

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“…All materials and precursors were of analytical grade, purchased from sigma Aldrich with high purity and used without doing any further purification. The WO 3 nanoparticles were synthesized using facile hydrothermal approach, through precursors Na 2 WO 4 .2H 2 O and NaCl as reported in our previous work . Typically, the 4‐mmol Na 2 WO 4 .2H 2 O was added into 40‐mL distilled water and stirred for 30 minutes at speed of 200 rpm.…”

Section: Methodsmentioning

confidence: 99%

“…The WO 3 nanoparticles were synthesized using facile hydrothermal approach, through precursors Na 2 WO 4 .2H 2 O and NaCl as reported in our previous work. 19 Typically, the 4-mmol Na 2 WO 4 .2H 2 O was added into 40-mL distilled water and stirred for 30 minutes at speed of 200 rpm. This mixture was transferred in 100-mL Teflon lined stainless steel autoclave with time duration of 24 hours at 180°C.…”

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confidence: 99%

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Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

2019

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Summary In this article, a ternary WO3/g‐C3N4@ BiVO4 composites were prepared using eco‐friendly hydrothermal method to produce efficient hydrogen energy through water in the presence of sacrificial agents. The prepared samples were characterized by scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), transmission electron microscopy (TEM), X‐ray diffraction (XRD), ultraviolet‐visible (UV‐vis), Brunauer‐Emmett‐Teller (BET) surface area, and photoluminescence spectroscopy (PL) emission spectroscopy. The experimental study envisages the formation of 2‐D nanostructures and observed that such kinds of nanostructures could provide more active sites for photocatalytic reduction of water and their inherent reactive‐species mechanism. The results showed the excellent photocatalytic performance (432 μmol h−1 g−1) for 1.5% BiVO4 nanoparticles in WO3/g‐C3N4 composite when compared with pure WO3 and BiVO4. The optical properties and photocatalytic activity measurement confirmed that BiVO4 nanoparticles in WO3/g‐C3N4 photocatalyst inhibited the recombination of photogenerated electron and holes and enhanced the reduction reactions for H2 production. The enhanced photocatalytic efficiency of the composite nanostructures may be attributed to wide absorption region of visible light, large surface area, and efficient separation of electrons/holes pairs owing to synergistic effects between BiVO4 and WO3/g‐C3N4. The prepared samples would be a precise optimal photocatalyst to increase their suppliers for worldwide applications especially in energy harvesting.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

2019

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“…On the other hand, Su et al [105] studied the application of C dots decorated/g-C 3 N 4 /TiO 2 for the degradation of enrofloxacin under visible light and assigned the observed enhancement to the upconversion photoluminescence properties of C dots, which convert near-infrared light wavelength into visible light wavelength [106]. As effective solutions for improving g-C 3 N 4 /TiO 2 performance, the incorporation of graphene quantum dots [107] and another semiconductor (i.e., MoS 2 [108], WO 3 [109]) is also reported; such systems resulted in enhanced separation of charges and the suppression of their recombination, thus leading to improved photocatalytic activity in the degradation of CECs.…”

Section: Tio 2 /G-c 3 Nmentioning

confidence: 99%

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

et al. 2020

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Clean water and the increased use of renewable energy are considered to be two of the main goals in the effort to achieve a sustainable living environment. The fulfillment of these goals may include the use of solar-driven photocatalytic processes that are found to be quite effective in water purification, as well as hydrogen generation. H2 production by water splitting and photocatalytic degradation of organic pollutants in water both rely on the formation of electron/hole (e−/h+) pairs at a semiconducting material upon its excitation by light with sufficient photon energy. Most of the photocatalytic studies involve the use of TiO2 and well-suited model compounds, either as sacrificial agents or pollutants. However, the wider application of this technology requires the harvesting of a broader spectrum of solar irradiation and the suppression of the recombination of photogenerated charge carriers. These limitations can be overcome by the use of different strategies, among which the focus is put on the creation of heterojunctions with another narrow bandgap semiconductor, which can provide high response in the visible light region. In this review paper, we report the most recent advances in the application of TiO2 based heterojunction (semiconductor-semiconductor) composites for photocatalytic water treatment and water splitting. This review article is subdivided into two major parts, namely Photocatalytic water treatment and Photocatalytic water splitting, to give a thorough examination of all achieved progress. The first part provides an overview on photocatalytic degradation mechanism principles, followed by the most recent applications for photocatalytic degradation and mineralization of contaminants of emerging concern (CEC), such as pharmaceuticals and pesticides with a critical insight into removal mechanism, while the second part focuses on fabrication of TiO2-based heterojunctions with carbon-based materials, transition metal oxides, transition metal chalcogenides, and multiple composites that were made of three or more semiconductor materials for photocatalytic water splitting.

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“…Further, it is transparent to visible and infrared light. Therefore, it has been used in different applications including smart windows [21], photocatalysts [22], solar cells [23], humidity sensors [24], and gas sensors [25]. Moreover, due to its excellent coloration efficiency [26], WO3 is the most used chromogenic material in photochromic, electrochromic, and gasochromic applications [27].…”

Section: Wo3 and Its Crystal Structurementioning

confidence: 99%

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Mirzaei

Kim

et al. 2019

Applied Sciences

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Hydrogen is one of the most important gases that can potentially replace fossil fuels in the future. Nevertheless, it is highly explosive, and its leakage should be detected by reliable gas sensors for safe operation during storage and usage. Most hydrogen gas sensors operate at high temperatures, which introduces the risk of hydrogen explosion. Gasochromic WO3 sensors work based on changes in their optical properties and color variation when exposed to hydrogen gas. They can work at low or room temperatures and, therefore, are good candidates for the detection of hydrogen leakage with low risk of explosion. Once their morphology and chemical composition are carefully designed, they can be used for the realization of sensitive, selective, low-cost, and flexible hydrogen sensors. In this review, for the first time, we discuss different aspects of gasochromic WO3 gas sensor-based hydrogen detection. Pristine, heterojunction, and noble metal-decorated WO3 nanostructures are discussed for the detection of hydrogen gas in terms of changes in their optical properties or visible color. This review is expected to provide a good background for research work in the field of gas sensors.

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Removal of acetylsalicylate and methyl-theobromine from aqueous environment using nano-photocatalyst WO3-TiO2 @g-C3N4 composite

Cited by 162 publications

References 48 publications

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

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Removal of acetylsalicylate and methyl-theobromine from aqueous environment using nano-photocatalyst WO3-TiO2 @g-C3N4 composite

Cited by 162 publications

References 48 publications

Boosting the performance of visible light‐driven WO 3 /g‐C 3 N 4 anchored with BiVO 4 nanoparticles for photocatalytic hydrogen evolution

Boosting the performance of visible light‐driven WO 3 /g‐C 3 N 4 anchored with BiVO 4 nanoparticles for photocatalytic hydrogen evolution

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

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Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution